body{
    background-color: #f9f9f9 !important;
}
section{
    width: 100%;
    background-color: #fff;
}
article{
    width: 70%;
    margin: 0 auto;
}
section nav{
    width: 100%;
    height: 60px;
    border-bottom: 1px solid #f0f0f0;
    padding-top: 130px;
}
ul,li{
    list-style-type: none;
    margin: 0;
    padding: 0 !important;
}

#list-nav{
    height: 50px;
    display: flex;
    justify-content: space-around;
    
}

#list-nav li{
    height: 100%;
    width: 20%;
    text-align: center;
    cursor: pointer;
    background-color: #fff;
}
#a{
    border-bottom: 5px solid #f0f0f0;
}

#b li{
    margin-top: 30px;
    background-color: #fff;
}

img{
    display: inline-block;
    position: relative;
    top: -10px;
}
#c{
    display: inline-block;
}
#c div span{
    color: rgb(0, 127, 255);
}